The '''vocal tract''' is that cavity in animals and humans, where sound that is produced at the sound source ([[larynx]] in mammals; [[syrinx (biology)|syrinx]] in birds) is filtered. In [[birds]] it consists of the [[trachea]], the [[Syrinx (biology)|syrinx]], the oral cavity, the upper part of the [[esophagus]], and the [[beak]]. In [[mammals]] it consists of the laryngeal cavity, the [[pharynx]], the oral cavity, and the nasal cavity, and in some nonhuman mammals maybe also the [[airsacs]].

The vocal tract is that cavity in animals and humans, where sound that is produced at the sound source (larynx in mammals; syrinx in birds) is filtered. In birds it consists of the trachea, the syrinx, the oral cavity, the upper part of the esophagus, and the beak. In mammals it consists of the laryngeal cavity, the pharynx, the oral cavity, and the nasal cavity, and in some nonhuman mammals maybe also the airsacs.